A body of mass $\mathrm{m}=10 \mathrm{~kg}$ is attached to one end of a wire of length 0.3 m . The maximum angular speed (in $\mathrm{rad} \mathrm{s}^{-1}$ ) with which it can be rotated about its other end in space station in (Breaking stress of wire $=4.8 \times 10^7 \mathrm{Nm}^{-2}$ and area of crosssection of the wire $=10^{-2} \mathrm{~cm}^2$ ) is